E21B 33/035
Specially adapted for underwater installations
Official title: specially adapted for underwater installations (E21B33/043, E21B33/064, E21B33/076 take precedence)
E21B33/035 (Specially adapted for underwater installations) appears on 2,028 US grants and 1,771 published applications in this corpus.
Search patents in E21B- Granted patents
- 2,028
- Published applications
- 1,771
- Assignees
- 499
- Inventors
- 2,886
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 10 | 0 |
| 1978 | 18 | 0 |
| 1979 | 9 | 0 |
| 1980 | 22 | 0 |
| 1981 | 14 | 0 |
| 1982 | 18 | 0 |
| 1983 | 20 | 0 |
| 1984 | 25 | 0 |
| 1985 | 17 | 0 |
| 1986 | 24 | 0 |
| 1987 | 34 | 0 |
| 1988 | 15 | 0 |
| 1989 | 28 | 0 |
| 1990 | 16 | 0 |
| 1991 | 16 | 0 |
| 1992 | 18 | 0 |
| 1993 | 16 | 0 |
| 1994 | 18 | 0 |
| 1995 | 11 | 0 |
| 1996 | 12 | 0 |
| 1997 | 8 | 0 |
| 1998 | 10 | 0 |
| 1999 | 26 | 0 |
| 2000 | 36 | 0 |
| 2001 | 31 | 14 |
| 2002 | 36 | 32 |
| 2003 | 36 | 43 |
| 2004 | 31 | 47 |
| 2005 | 22 | 38 |
| 2006 | 42 | 40 |
| 2007 | 19 | 30 |
| 2008 | 25 | 39 |
| 2009 | 25 | 47 |
| 2010 | 25 | 61 |
| 2011 | 30 | 80 |
| 2012 | 55 | 94 |
| 2013 | 72 | 101 |
| 2014 | 84 | 100 |
| 2015 | 109 | 94 |
| 2016 | 82 | 91 |
| 2017 | 99 | 103 |
| 2018 | 97 | 91 |
| 2019 | 74 | 81 |
| 2020 | 86 | 96 |
| 2021 | 89 | 92 |
| 2022 | 95 | 92 |
| 2023 | 92 | 88 |
| 2024 | 98 | 66 |
| 2025 | 72 | 62 |
| 2026 | 47 | 49 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Tubing hanger orientation system18 Aug 2026US 12,709,957 B1Hosie Subsea Ingenuity & Evolution LLC
- High torque actuated tubing hanger orientation11 Aug 2026US 12,704,037 B2FMC Kongsberg Subsea AS
- Energy delivery system for supplying hydraulic pressure for severing an intervention medium11 Aug 2026US 12,704,042 B2Halliburton Energy Services.Inc.
- Overpressure compensation systems and assemblies for a subsea manifold11 Aug 2026US 12,704,862 B2FMC Technologies, Inc.
- Subsea actuation system with retrievable position indicator4 Aug 2026US 12,698,689 B2TechnipFMC Norge AS
- Wellhead fatigue damage estimation using probabilistic generative ai models1 Oct 2026US 2026/0298047 A1Chevron U.S.A.Inc.
- Wellhead assemblies and methods24 Sep 2026US 2026/0286801 A1Onesubsea, LLC
- System and method for barrier testing injection xmas tree24 Sep 2026US 2026/0286840 A1
- Subsea pumping and booster system17 Sep 2026US 2026/0275839 A1Baker Hughes Energy Technology UK Limited
- Magnetically coupled inflow control device10 Sep 2026US 2026/0266155 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Method and apparatus for deepwater drilling283US 4,813,495 AConoco Inc. · 1989
- System and technique for monitoring and managing the deployment of subsea equipment140US 6,725,924 B2Schlumberger Technology Corporation · 2004
- Wellhead138US 5,544,707 ACooper Cameron Corporation · 1996
- Subsea caisson and method of installing same133US 4,558,744 ACanOcean Resources Ltd. · 1985
- Slimbore subsea completion system and method131US 6,227,300 B1FMC Corporation · 2001